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Other Income (Expense) - Net - Computation of Other Income (Expense) - Net (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Other Income and Expenses [Abstract]      
Interest income $ 1.7 $ 1.5 $ 0.6
Net foreign exchange loss (3.9) (3.6) (3.9)
Net periodic pension and postretirement benefits - non-service 10.6 10.4 3.7
Settlement of treasury lock 0.0 0.0 13.3
Loss on early extinguishment of debt 0.0 0.0 (7.8)
Other 0.3 0.5 (1.7)
Total other income (expense) – net $ 8.7 $ 8.8 $ 4.2